using System;

public class Program

{

    public static void Main()

    {

        int n1,n2,temp;

        n1=Convert.ToInt32(Console.ReadLine());

        n2=Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("before swapping n1={0} n2={1}",n1,n2);

        temp=n1;

        n1=n2;

        n2=temp;

        Console.WriteLine("after swapping n1={0} n2={1}",n1,n2);

    }

}